Rockwell Automation 1747-SCNR ControlNet Scanner Module Reference Manual - Manual (Page 50)

Publication 1747-RM623D-EN-P - June 2006
5-6 Troubleshoot
See the table that describes how the status indicator is behaving, the
cause of the behavior, and the action you should take.
and Probable Cause Recommended Action
Off No power No action required or apply power.
Steady red Faulty unit Cycle power or reset unit. If fault persists, contact a
Rockwell Automation representative or distributor.
Alternating red/green Self-test No action required.
Alternating red/off Incorrect node
configuration or
duplicate
ControlNet node
address Check network address and other ControlNet
configuration parameters.
or Probable Cause Recommended Action
Off Channel disabled Program network for redundant media, if required.
Steady green Normal operation No action required.
Flashing green/off Temporary
network errors • Check media for items such as broken
cables, loose connectors, and missing
terminators.
Flashing red/off Media fault
• Check media for broken cables, loose
connectors, missing terminators, etc.
No other nodes
present on the
network Add other nodes to the network.
Flashing red/green Incorrect node
address Change 1747-SCNR node address so that it is less
than or equal to SMAX.
(1)
Incorrect network
configuration Reconfigure ControlNet network so that SMAX 1 is
greater than or equal to 1747-SCNR node address.
(1) SMAX is the highest node address on a ControlNet network that can transmit scheduled data.
A B
A B